[PATCH 2/2] regulator: Provide devm_regulator_bulk_get()
From: Mark Brown
Date: Sun Jan 22 2012 - 11:12:49 EST
Allow drivers to benefit from both the bulk APIs and managed resources
simultaneously.
Signed-off-by: Mark Brown <broonie@xxxxxxxxxxxxxxxxxxxxxxxxxxx>
---
drivers/regulator/core.c | 46 ++++++++++++++++++++++++++++++++++++
include/linux/regulator/consumer.h | 2 +
2 files changed, 48 insertions(+), 0 deletions(-)
diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index 88bcb11..1432c22 100644
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -2463,6 +2463,52 @@ err:
}
EXPORT_SYMBOL_GPL(regulator_bulk_get);
+/**
+ * devm_regulator_bulk_get - managed get multiple regulator consumers
+ *
+ * @dev: Device to supply
+ * @num_consumers: Number of consumers to register
+ * @consumers: Configuration of consumers; clients are stored here.
+ *
+ * @return 0 on success, an errno on failure.
+ *
+ * This helper function allows drivers to get several regulator
+ * consumers in one operation with management, the regulators will
+ * automatically be freed when the device is unbound. If any of the
+ * regulators cannot be acquired then any regulators that were
+ * allocated will be freed before returning to the caller.
+ */
+int devm_regulator_bulk_get(struct device *dev, int num_consumers,
+ struct regulator_bulk_data *consumers)
+{
+ int i;
+ int ret;
+
+ for (i = 0; i < num_consumers; i++)
+ consumers[i].consumer = NULL;
+
+ for (i = 0; i < num_consumers; i++) {
+ consumers[i].consumer = devm_regulator_get(dev,
+ consumers[i].supply);
+ if (IS_ERR(consumers[i].consumer)) {
+ ret = PTR_ERR(consumers[i].consumer);
+ dev_err(dev, "Failed to get supply '%s': %d\n",
+ consumers[i].supply, ret);
+ consumers[i].consumer = NULL;
+ goto err;
+ }
+ }
+
+ return 0;
+
+err:
+ for (i = 0; i < num_consumers && consumers[i].consumer; i++)
+ devm_regulator_put(consumers[i].consumer);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(devm_regulator_bulk_get);
+
static void regulator_bulk_enable_async(void *data, async_cookie_t cookie)
{
struct regulator_bulk_data *bulk = data;
diff --git a/include/linux/regulator/consumer.h b/include/linux/regulator/consumer.h
index 60c2f99..35c4283 100644
--- a/include/linux/regulator/consumer.h
+++ b/include/linux/regulator/consumer.h
@@ -148,6 +148,8 @@ int regulator_disable_deferred(struct regulator *regulator, int ms);
int regulator_bulk_get(struct device *dev, int num_consumers,
struct regulator_bulk_data *consumers);
+int devm_regulator_bulk_get(struct device *dev, int num_consumers,
+ struct regulator_bulk_data *consumers);
int regulator_bulk_enable(int num_consumers,
struct regulator_bulk_data *consumers);
int regulator_bulk_disable(int num_consumers,
--
1.7.7.3
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